Ultra-short-focus projection equipment

Abstract

The invention provides ultra-short-focus projection equipment, relates to the technical field of projection display, and is used for reducing the layering sense of the ultra-short-focus projection equipment. The ultra-short-focus projection equipment comprises a projection screen, a projection host and a telescopic holder. The projection host is located on one side of the projection screen, a mounting groove is formed in the bottom of the projection host and provided with a first opening and a second opening, the first opening is formed in the bottom of the projection host, and the second opening is formed in the side wall, close to the projection screen, of the projection host and communicated with the first opening. And the telescopic holder is connected to the mounting groove, penetrates through the second opening and is used for driving the projection host to move in the direction close to or away from the projection screen. Therefore, the integration degree of the ultra-short-focus projection equipment is improved, and the layering sense of the ultra-short-focus projection equipment can be reduced. And meanwhile, the use cost of the user is reduced, so that the use experience of the user is improved.

Description

Technical Field

[0001] This application relates to the field of projection display technology, and particularly to an ultra-short throw projection device. Background Art

[0002] Currently, ultra-short throw projection devices such as laser TVs are applied in many occasions. A laser TV includes a projection host and a projection screen. Laser light is emitted from the projection host and projected onto the projection screen, and then reflected by the projection screen and enters the human eye for imaging. The projection ratio of a laser TV refers to the sizes of the largest and smallest images projected onto the projection screen at the same distance. Since the laser TV forms an image by reflection of the projection screen, the projection ratio of the projection host needs to match the curtain. At the same time, during the use of the laser TV, users will adjust the positional relationship between the projection host and the projection screen according to their own preferences to meet different sizes of projected images.

[0003] Generally, the projection host needs to be placed on a TV cabinet, but the depth of existing TV cabinets cannot meet the depth of the TV cabinet required by the projection ratio of the laser TV. In related technologies, it is necessary to additionally install a telescopic pan-tilt on the projection host to assist the projection host to reach the specified position. After the telescopic pan-tilt in related technologies is installed on the projection host, the layering of the ultra-short throw projection device is more prominent, and users need to install the telescopic pan-tilt by themselves, which increases the cost of using the ultra-short throw projection device and reduces the user experience. Summary of the Invention

[0004] In order to solve the above technical problems, this application provides an ultra-short throw projection device for reducing the layering of the ultra-short throw projection device.

[0005] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0006] The embodiments of this application provide an ultra-short throw projection device, which includes: a projection screen, a projection host, and a telescopic pan-tilt. The projection host is located on one side of the projection screen. An installation groove is provided on the bottom of the projection host. The installation groove has a first opening and a second opening. The first opening is formed on the bottom of the projection host, and the second opening is formed on the side wall of the projection host close to the projection screen and is communicated with the first opening. The telescopic pan-tilt is connected to the installation groove and passes through the second opening. The telescopic pan-tilt is used to drive the projection host to move in a direction close to or away from the projection screen.

[0007] According to the ultra-short throw projection device of the embodiments of the present application, by providing an installation groove on the projection host and arranging the telescopic pan-tilt in the installation groove, the telescopic pan-tilt can be integrated with the projection host, which is beneficial to improving the integration degree of the ultra-short throw projection device and can reduce the layering sense of the ultra-short throw projection device. At the same time, it also avoids the need for users to additionally install a device for controlling the movement of the projection host when using the ultra-short throw projection device, which is beneficial to reducing the user's usage cost and thus beneficial to improving the user's usage experience. In addition, by providing a first opening and a second opening communicating with the installation groove, the operator can assemble the telescopic pan-tilt from the bottom or side of the projection host. And the second opening can limit the movement of the telescopic pan-tilt to the side close to the projection screen, which is beneficial to improving the user's usage experience.

[0008] In some embodiments, the telescopic pan-tilt includes a support base and a driving device. The support base has a receiving cavity, and the driving device is arranged in the receiving cavity. The driving device includes a driving motor, a driving member, and a transmission member. The output end of the driving motor is connected to the driving member, the driving member is connected to the transmission member, and the transmission member is connected to the projection host to drive the projection host to switch between the extended position and the retracted position through the transmission member.

[0009] In some embodiments, the telescopic pan-tilt further includes a moving platform, which is movably arranged on the support base and is connected to the transmission member. The moving platform is used to carry the projection host.

[0010] In some embodiments, the projection host includes a lower shell, and a part of the lower shell is recessed towards the direction close to the projection screen to form an installation groove, and the moving platform is connected to the lower shell.

[0011] In some embodiments, the telescopic pan-tilt further includes a support member, which is connected to the transmission member, is arranged on the bottom wall of the installation groove and is located between the support base and the side wall of the installation groove, and the support member extends in the direction close to or away from the projection screen.

[0012] In some embodiments, a third opening is provided on the side of the receiving cavity close to the projection host. The telescopic pan-tilt further includes a dust-proof member, which is arranged at the third opening and has a spacing from the support member. The dust-proof member is used to cover a part of the third opening exposed by the projection host when the projection host moves.

[0013] In some embodiments, the transmission member includes a guide rod and a plurality of sliding members. The guide rod extends in the direction close to or away from the projection screen and is arranged in the receiving cavity. The plurality of sliding members are spaced on the guide rod, and the driving member is connected to the support member through the sliding members.

[0014] In some embodiments, the sliding member is connected to the installation groove.

[0015] In some embodiments, the projection host includes a lower shell, and a part of the lower shell is recessed toward the direction close to the projection screen to form a mounting groove, and the support member is connected to the lower shell.

[0016] In some embodiments, the projection host includes a lower shell and a base. The lower shell has an accommodation space, the base is located in the accommodation space and is stacked with the lower shell. The mounting groove is located on the lower shell and communicates with the accommodation space, and the support member is connected to the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0018] To more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0019] Figure 1 Schematic diagram of a ultra-short throw projection device provided by some embodiments of the present application;

[0020] Figure 2 Schematic diagram of a ultra-short throw projection device provided by other embodiments of the present application;

[0021] Figure 3 Schematic diagram of a projection host provided by some embodiments of the present application;

[0022] Figure 4 Schematic diagram of a telescopic pan-tilt provided by some embodiments of the present application;

[0023] Figure 5 Schematic diagram of the connection between a telescopic pan-tilt and a projection host provided by some embodiments of the present application;

[0024] Figure 6 Schematic diagram of the connection between a telescopic pan-tilt and a projection host provided by other embodiments of the present application;

[0025] Figure 7 Schematic diagram of a telescopic pan-tilt provided by other embodiments of the present application;

[0026] Figure 8 Schematic diagram of a telescopic pan-tilt provided by other embodiments of the present application;

[0027] Figure 9 Schematic diagram of the connection between a telescopic pan-tilt and a projection host provided by other embodiments of the present application;

[0028] Figure 10Schematic diagram of the connection between the telescopic cloud platform and the projection host provided for other embodiments.

[0029] Reference numerals:

[0030] 100, ultra-short throw projection device;

[0031] 1, projection screen;

[0032] 2, projection host; 21, installation groove; 211, first opening; 212, second opening; 22, lower shell; 23, base;

[0033] 3, telescopic cloud platform; 31, support base; 311, accommodation cavity; 312, third opening; 32, driving device; 321, driving motor; 322, driving member; 3221, lead screw; 3222, nut; 323, transmission member; 3231, sliding member; 3232, guide rod; 33, moving platform; 34, support member; 35, dust-proof member. Detailed implementation manners

[0034] In order to be able to more clearly understand the above-mentioned objects, features, and advantages of the present application, the solutions of the present application will be further described below. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0036] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0037] In the description of the embodiments of the present application, the term "and / or" refers to and encompasses any and all possible combinations of one or more of the associated listed items. The term "and / or" is a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0038] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, "connected" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the two are connected and the relative positional relationship after connection remains unchanged. In addition, the orientation terms mentioned in the embodiments of the present application, such as "inside", "outside", etc., are only with reference to the direction of the attached drawings. Therefore, the orientation terms used are for better and clearer description and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the embodiments of the present application.

[0039] In the description of the embodiments of the present application, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0040] In the related art, it is necessary to additionally install a telescopic pan-tilt on the projection host to assist the projection host to reach the specified position. After the telescopic pan-tilt in the related art is installed on the projection host, the layering of the ultra-short-throw projection device is relatively prominent, and the user needs to install the telescopic pan-tilt by himself, which increases the cost of the user using the ultra-short-throw projection device and reduces the user experience.

[0041] To solve the above technical problems, the embodiments of the present application provide an ultra-short-throw projection device. Among them, the ultra-short-throw projection device can be a laser TV or an ultra-short-throw projector.

[0042] Please refer to Figure 1 and Figure 2 , Figure 1 which are schematic diagrams of the ultra-short-throw projection device provided by some embodiments of the present application, Figure 2 and

[0043] which are schematic diagrams of the ultra-short-throw projection device provided by other embodiments of the present application. The ultra-short-throw projection device 100 may include a projection screen 1, a projection host 2, and a telescopic pan-tilt 3.The projection screen 1 can be used to carry the image projected by the projection host 2. Among them, the projection screen 1 can be not limited to a specific screen structure and can also be a projection surface such as a wall.

[0044] The projection host 2 can be used to project images. The projection host 2 is located on one side of the projection screen 1. The projection host 2 can have opposite top and bottom. The top can be located on the side of the projection host 2 close to the projection screen 1. The projection port of the projection host 2 can be set on the top, and the projection host 2 can project the image on the projection screen 1 through the projection port.

[0045] Please refer to Figure 2 and Figure 3 , Figure 3 is a schematic diagram of the projection host provided by some embodiments of the present application. An installation groove 21 can be provided on the bottom of the projection host 2, that is, the installation groove 21 can be recessed in the direction close to the top of the projection host 2. The installation groove 21 can have a first opening 211 and a second opening 212. The first opening 211 can be formed on the bottom of the projection host 2. The second opening 212 is formed on the side of the projection host 2 close to the projection screen 1. Specifically, the telescopic pan-tilt 3 is located at the bottom of the projection host 2. The second opening 212 and the first opening 211 are located on two adjacent sides of the installation groove 21. The first opening 211 of the installation groove 21 faces the telescopic pan-tilt 3, and the second opening 212 is formed on the circumferential side of the installation groove 21 and is located on the side of the installation groove 21 close to the projection screen 1.

[0046] Thus, the installation groove 21 can be entered through the first opening 211 and the second opening 212. And since the second opening 212 is located on the side of the projection host 2 close to the projection screen 1, it is possible to avoid setting an opening on the side of the projection host 2 facing the user, thereby making the side of the projection host 2 facing the user more beautiful and conducive to improving the user experience.

[0047] Please continue to refer to Figures 1-3, the telescopic cloud platform 3 can be used to drive the projection host 2 to move in a direction close to or away from the projection screen 1. The telescopic cloud platform 3 is connected to the projection host 2. Specifically, the focal length of the projection image of the ultra-short throw projection device 100 is relatively short, so that when the distance between the projection host 2 and the projection screen 1 is relatively close, an image can be projected on the projection screen 1. In order to ensure the normal projection of the projection host 2, a certain distance needs to be maintained between the installation plane of the projection host 2 and the projection screen 1, which will result in a larger size of the TV cabinet on which the projection host 2 is placed, or the need to move the TV cabinet on which the projection host 2 is placed, thus reducing the user experience. By setting the telescopic cloud platform 3, the projection host 2 is installed on the telescopic cloud platform 3 that can move horizontally. The telescopic cloud platform 3 drives the projection host 2 to move in a direction close to or away from the projection screen 1, so that a suitable distance can be maintained between the projection host 2 and the projection screen 1 when the projection host 2 is working. When the projection host 2 stops being used, the telescopic cloud platform 3 can drive the projection host 2 back to the TV cabinet to reduce the floor area occupied by the projection host 2 and the telescopic cloud platform 3.

[0048] Please continue to refer to Figure 2 and Figure 3 , the telescopic cloud platform 3 is connected in the installation groove 21 and passes through the second opening 212. Specifically, a part of the telescopic cloud platform 3 is directly arranged in the installation groove 21 through the first opening 211 and the second opening 212. And because the telescopic cloud platform 3 drives the projection host 2 to move in a direction close to or away from the projection screen 1, a part of the telescopic cloud platform 3 can pass through the second opening 212 and move in a direction close to or away from the projection screen 1, so as to drive the projection host 2 to move.

[0049] Thus, by setting the communicating first opening 211 and second opening 212, the operator can assemble the telescopic cloud platform 3 from the bottom or side of the projection host 2, which is beneficial to reducing the assembly difficulty of the telescopic cloud platform 3, thus beneficial to reducing the assembly speed of the ultra-short throw projection device 100. And the setting of the second opening 212 facilitates the telescopic cloud platform 3 to drive the projection host 2 to move in a direction close to or away from the projection screen 1. At the same time, the telescopic cloud platform 3 is directly arranged in the installation groove 21, which is beneficial to improving the integration degree of the ultra-short throw projection device 100 and can reduce the layering sense of the ultra-short throw projection device 100. In addition, the ultra-short throw projection device 100 can also have the ability to adjust the position of the projection host 2, which can avoid users from installing by themselves, beneficial to reducing the cost for users to use the ultra-short throw projection device 100, and beneficial to improving the user experience.

[0050] According to the ultra-short throw projection device 100 of the embodiments of the present application, by providing an installation groove 21 on the projection host 2 and arranging the telescopic cloud platform 3 in the installation groove 21, the telescopic cloud platform 3 can be integrated with the projection host 2, which is beneficial to improving the integration degree of the ultra-short throw projection device 100 and can reduce the layering sense of the ultra-short throw projection device 100. At the same time, it also avoids the need for users to additionally install a device for controlling the movement of the projection host 2 when using the ultra-short throw projection device 100, which is beneficial to reducing the user's usage cost and thus beneficial to improving the user's usage experience. In addition, by providing a first opening 211 and a second opening 212 communicating with the installation groove 21, an operator can assemble the telescopic cloud platform 3 from the bottom or side of the projection host 2, which is beneficial to improving the assembly efficiency of the ultra-short throw projection device 100. And the second opening 212 can limit the movement of the telescopic cloud platform 3 to the side close to the projection screen 1, which is beneficial to improving the user's usage experience.

[0051] Please refer to 2- Figure 4 , Figure 4 is a schematic diagram of the telescopic cloud platform provided by some embodiments of the present application. In some embodiments, the telescopic cloud platform 3 may include a support base 31 and a driving device 32. The support base 31 may have a receiving cavity 311, and the driving device 32 may be arranged in the receiving cavity 311. The driving device 32 can drive the projection host 2 to move in a direction close to or away from the projection screen 1. Among them, the projection host 2 may have an extended position and a retracted position.

[0052] Specifically, the retracted position may be that the projection host 2 moves in a direction close to the projection screen 1, so that both the projection host 2 and the telescopic cloud platform 3 are located on the TV cabinet. The extended position may be that the projection host 2 moves in a direction away from the projection screen 1 until a suitable projection distance is maintained between the projection host 2 and the projection screen 1, so that the projection host 2 can project a clear image on the projection screen 1. At this time, the position of the projection host 2 is the extended position. Thus, the driving device 32 can be used to drive the projection host 2 to move, so that the driving device 32 can drive the projection host 2 to maintain a suitable relative position with the projection screen 1, thereby ensuring the display effect of the ultra-short throw projection device 100 and further ensuring the user's usage experience.

[0053] The driving device 32 may include a driving motor 321, a driving member 322 and a transmission member 323. The output end of the driving motor 321 may be in transmission connection with the driving member 322. The driving member 322 may be movably connected to the transmission member 323. The transmission member 323 may be connected to the projection host 2 to drive the projection host 2 to switch between the extended position and the retracted position through the transmission member 323. Thus, through the cooperation between the driving motor 321, the driving member 322 and the transmission member 323, the projection host 2 can be driven to move in a direction close to or away from the projection screen 1, and the control method is simple.

[0054] It should be noted that the transmission member 323 can be directly connected to the projection host 2, or the transmission member 323 can be indirectly connected to the projection host 2.

[0055] Exemplarily, the driving member 322 can include a lead screw 3221 and a nut 3222 that are cooperatively connected. The lead screw 3221 can extend in a direction close to or away from the projection screen 1. The lead screw 3221 is in transmission connection with the driving motor 321. The nut 3222 is sleeved on the lead screw 3221 and is in threaded cooperation with the lead screw 3221. The transmission member 323 is connected to the nut 3222, so that the driving motor 321 can drive the lead screw 3221 to rotate, thereby driving the nut 3222 to move along the extension direction of the lead screw 3221, and further driving the transmission member 323 to move, so that the transmission member 323 can drive the projection host 2 to move. Such a setting has a simple structure and convenient operation, which is beneficial to reducing the manufacturing cost of the telescopic cloud platform 3.

[0056] Specifically, a thread is provided on the surface of the lead screw 3221, and a threaded hole is provided on the nut 3222, so that the lead screw 3221 is in threaded connection with the threaded hole on the nut 3222, so that the nut 3222 can rotate relative to the lead screw 3221 and can move along the extension direction of the lead screw 3221 on the lead screw 3221 through the thread. When the driving motor 321 drives the lead screw 3221 to rotate, it is the nut 3222 that rotates relative to the lead screw 3221.

[0057] Exemplarily, the output end of the driving motor 321 can be connected to the driving member 322 through a coupling. The driving device 32 can also include a sensor, and the movement of the driving member 322 can be sensed through the sensor.

[0058] Please refer to Figure 4 and Figure 5 , Figure 5 which is a schematic diagram of the connection between the telescopic cloud platform and the projection host provided by some embodiments of the present application. In some embodiments, the telescopic cloud platform 3 can further include a moving platform 33. The moving platform 33 can be movably arranged on the support base 31 and is connected to the transmission member 323. The moving platform 33 is used to carry the projection host 2. Specifically, the driving motor 321 can drive the driving member 322 to drive the transmission member 323 to move. Since the moving platform 33 is connected to the transmission member 323 and the moving platform 33 can move relative to the support base 31, the moving platform 33 can be driven to move through the transmission member 323, so that the moving platform 33 can drive the projection host 2 to switch between the extended position and the retracted position.

[0059] Thus, the support base 31 can be protected by the mobile platform 33, preventing dust from entering the support base 31, which is beneficial to extending the service life of the telescopic pan-tilt head 3. At the same time, the mobile platform 33 can be directly connected to the projection host 2, reducing the assembly difficulty and facilitating the improvement of the assembly speed of the ultra-short throw projection device 100.

[0060] Exemplarily, the mobile platform 33 and the projection host 2 can be detachably connected, which is convenient for replacing and repairing the telescopic pan-tilt head 3 and beneficial to improving the maintainability of the ultra-short throw projection device 100.

[0061] The mobile platform 33 and the projection host 2 can be detachably connected by means such as bolt connection or snap connection.

[0062] Please continue to refer to Figure 4 and Figure 5 In some embodiments, the projection host 2 can include a lower housing 22. A part of the lower housing 22 is recessed towards the direction close to the projection screen 1 to form an installation groove 21. The mobile platform 33 is connected to the lower housing 22. Thus, the structure of the lower housing 22 can be directly changed by modifying the mold design of the lower housing 22, reducing the impact on the overall structure of the projection host 2 and facilitating the reduction of the cost of the ultra-short throw projection device 100. At the same time, the direct connection between the mobile platform 33 and the lower housing 22 can support the movement of the projection host 2 through the lower housing 22 and the mobile platform 33, which is beneficial to improving the reliability and stability of the movement of the projection host 2.

[0063] Please refer to Figure 6 and Figure 7 Figure 6 which is a schematic diagram of the connection between the telescopic pan-tilt head and the projection host provided in some other embodiments of this implementation. Figure 7 which is a schematic diagram of the telescopic pan-tilt head provided in some other embodiments of this application. In some embodiments, the telescopic pan-tilt head 3 can further include a support member 34. The transmission member 323 is connected to the support member 34. The support member 34 can be disposed on the bottom wall of the installation groove 21 and located between the support base 31 and the side wall of the installation groove 21. The support member 34 extends in the direction close to or away from the projection screen. Specifically, in the direction perpendicular to the movement direction of the projection host 1, the support member 34 can be located on one side of the support base 31 and connected to the installation groove 21. Thus, when the driving motor 321 drives the transmission member 323 to move, since the transmission member 323 is connected to the support member 34, the transmission member 323 can drive the support member 34 to move, and the support member 34 can also guide the movement of the projection host 1, which is beneficial to improving the reliability of the movement of the ultra-short throw projection device 100 and also beneficial to reducing the manufacturing cost of the ultra-short throw projection device 100.

[0064] ​Exemplarily, the telescopic pan-tilt head 3 includes a plurality of support members 34. The plurality of support members 34 can be spaced apart and arranged on the bottom wall of the installation groove 21, and the transmission member 323 is connected to the support member 34. Herein, the "plurality of" support members 34 means that the number of support members 34 is two or more, and the plurality of support members 34 can be evenly arranged on the bottom wall of the installation groove 21. Thereby, the reliability of the movement of the ultra-short throw projection device 100 can be further improved.

[0065] Exemplarily, the number of the support members 34 can be two, and the two support members 34 can be opposite to the opposite side walls of the support base 31 respectively. Thereby, it can be first connected to the support base 31 and then connected to the installation groove 21, so as to facilitate the pre-positioning of the installation position of the support member 34 and reduce the assembly difficulty.

[0066] Please continue to refer to Figure 6 and Figure 7 , in some embodiments, the support member 34 is detachably connected to the projection host 2. Thereby, it is convenient to replace and repair the damaged support member 34, which is beneficial to improving the maintainability of the ultra-short throw projection device 100.

[0067] Exemplarily, the support member 34 can be provided with mounting holes, and the projection host 2 can be provided with mating holes opposite to the mounting holes. By passing bolts through the mounting holes and the mating holes, the detachable connection between the support member 34 and the projection host 2 can be realized. Such a setting has a simple structure, is convenient for installing the support member 34, and is beneficial to improving the assembly speed of the ultra-short throw projection device 100.

[0068] Exemplarily, the installation groove 21 of the projection host 2 can also be provided with adjustment holes for installing devices for adjusting the pitching angle of the projection host 2.

[0069] Please continue to refer to Figure 6 and Figure 7 , in some embodiments, the transmission member 323 can include a sliding member 3231 and a guide rod 3232. The guide rod 3232 is arranged in the accommodation cavity 311. The guide rod 3232 can extend in a direction close to or away from the projection screen 1. Herein, when the driving member 322 includes a lead screw 3221 and a nut 3222, the guide rod 3232 can be parallel to the lead screw 3221.

[0070] The sliding member 3231 is slidably sleeved on the guide rod 3232 along the extending direction of the guide rod 3232. One end of the sliding member 3231 is connected to the support member 34, and the other end is connected to the driving member 322. Thereby, when the driving motor 321 drives the driving member 322 to move, the driving member 322 can drive the sliding member 3231 to move along the extending direction of the guide rod 3232, so as to drive the support member 34 to move, and the support member 34 can drive the projection host 2 to switch between the extended position and the retracted position.

[0071] Thus, by providing the guide rod 3232, the sliding direction of the slider 3231 can be restricted, and at the same time, the slider 3231 can slide more stably in the direction closer to or farther from the projection screen 1, which is beneficial to improving the stability and reliability of the movement of the projection host 2.

[0072] Please continue to refer to Figure 6 and Figure 7 , in some embodiments, the number of sliders 3231 can be multiple. The multiple sliders 3231 can be arranged at intervals on the guide rod 3232. Thus, the support member 34 can be connected to the multiple sliders 3231, which can prevent the breakage between the support member 34 and the slider 3231, and can further improve the stability and reliability of the movement of the projection host 2.

[0073] Exemplarily, the slider 3231 can be detachably connected to the support member 34. Among them, the detachable connection can be achieved through fasteners, snap connectors, etc. Thus, it is convenient to replace the slider 3231 or the support member 34, which is beneficial to improving the service life and maintainability of the telescopic pan-tilt 3, and thus beneficial to improving the user experience.

[0074] Exemplarily, the slider 3231 is detachably connected to the driving member 322. Thus, the maintainability of the ultra-short throw projection device 100 can be further improved.

[0075] In some embodiments, the slider 3231 is connected to the mounting groove 21. Thus, while the slider 3231 is connected to the support member 34, it can also be connected to the projection host 1, enabling the projection host 1 to have more connection points, improving the connection reliability between the telescopic pan-tilt 3 and the projection host 1, and thus improving the stability and reliability of the movement of the projection host 2.

[0076] Please refer to Figure 8 , Figure 8 which is a schematic diagram of the telescopic pan-tilt provided in some other embodiments of the present application. In some embodiments, the accommodation cavity 311 may have a third opening 312 on the side closer to the projection host 2. Thus, the driving device 32 can be directly placed into the accommodation cavity 311 of the support base 31 through the third opening 312, which is convenient for assembling the driving device 32, thus being beneficial to reducing the assembly difficulty of the driving device 32, and further being beneficial to improving the assembly speed of the ultra-short throw projection device 100.

[0077] The telescopic pan-tilt 3 may further include a dust-proof member 35, and the dust-proof member 35 is disposed at the third opening 312. Thus, the dust-proof member 35 can prevent dust and other debris from entering the accommodation cavity 311 through the third opening 312, which is beneficial to improving the safety and reliability of the use of the driving device 32.

[0078] There is a gap between the dust-proof member 35 and the support member 34. Thus, interference of the dust-proof member 35 with the movement of the projection host 2 can be avoided, which is beneficial to improving the stability and reliability of the movement of the projection host 2.

[0079] The dust-proof member 35 is used to cover the part of the projection host 1 exposed from the third opening 312 when the projection host 1 moves. Specifically, when the projection host 2 is in the extended position, the dust-proof member 35 can cover the part of the third opening 312 that does not overlap with the projection host 2. Thus, the dust-proof function of the accommodation cavity 311 can be fully utilized by the projection host 1 and the dust-proof member 35, which is beneficial to reducing the manufacturing cost of the telescopic pan-tilt 3.

[0080] It should be noted that it is also possible that the dust-proof member 35 completely covers the third opening 312.

[0081] Please refer to Figure 9 , Figure 9 which is a schematic diagram of the connection between the telescopic pan-tilt and the projection host provided in some other embodiments of the present application. In some embodiments, the projection host 2 may include a lower shell 22. A part of the lower shell 22 is recessed towards the direction close to the projection screen 1 to form a mounting groove 21, and the support member 34 is connected to the lower shell 22. Thus, by directly connecting the support member 34 to the lower shell 22, the setting of the moving platform can be avoided, which is beneficial to reducing the manufacturing cost of the ultra-short-throw projection device 100. At the same time, it is also beneficial to improve the integration degree of the ultra-short-throw projection device 100, so that more parts of the telescopic pan-tilt 3 can be hidden in the mounting groove 21.

[0082] Please refer to Figure 10 , Figure 10 which is a schematic diagram of the connection between the telescopic pan-tilt and the projection host provided in some other embodiments of the present application. In some embodiments, the projection host 2 may include a lower shell 22 and a base 23. The lower shell 22 may have an accommodation space. The base 23 may be located in the accommodation space and is stacked with the lower shell 22. The mounting groove 21 is located on the lower shell 22 and is communicated with the accommodation space, and the support member 34 is connected to the base 23. Specifically, devices related to projection may be provided on the base 23. The base 23 is located in the accommodation space of the lower shell 22. The mounting groove 21 hollowes out the lower shell 22 to expose the base 23 in the accommodation space, and the base 23 is connected to the support member 34. Thus, the support member 34 can be directly connected to the base 23, which can reduce the manufacturing cost of the lower shell 22, and thus is beneficial to reducing the manufacturing cost of the ultra-short-throw projection device 100. At the same time, the integration degree of the ultra-short-throw projection device 100 can be further improved, which is beneficial to the thin-type design of the ultra-short-throw projection device 100.

[0083] It should be noted that it is also possible that the moving platform is directly connected to the base 23.

[0084] In the description of this specification, specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0085] As described above, the specific implementation manners of the present invention are only described, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A ultra-short throw projection device, characterized in that, The ultra-short throw projection device includes: A projection screen; A projection host, located on one side of the projection screen. An installation groove is provided at the bottom of the projection host. The installation groove has a first opening and a second opening. The first opening is formed at the bottom of the projection host, and the second opening is formed on the side wall of the projection host close to the projection screen and is communicated with the first opening; A telescopic cloud platform, which is connected to the installation groove and passes through the second opening. The telescopic cloud platform is used to drive the projection host to move in a direction close to or away from the projection screen.

2. The ultra-short throw projection device according to claim 1, characterized in that, The telescopic cloud platform includes a support base and a driving device. The support base has a receiving cavity, and the driving device is arranged in the receiving cavity; The driving device includes a driving motor, a driving member and a transmission member. The output end of the driving motor is in transmission connection with the driving member. The driving member is movably connected with the transmission member, and the transmission member is connected with the projection host to drive the projection host to move in a direction close to or away from the projection screen through the transmission member.

3. The ultra-short focus projection device according to claim 2, wherein The telescopic cloud platform further includes a moving platform, which is movably arranged on the support base and is connected with the transmission member. The moving platform is connected with the installation groove.

4. The ultra-short throw projection device according to claim 3, wherein, The projection host includes a lower shell. A part of the lower shell is recessed towards the direction close to the projection screen to form the installation groove. The moving platform is connected with the lower shell.

5. The ultra-short throw projection device according to claim 2, characterized in that, The telescopic cloud platform further includes a support member, which is connected with the transmission member. The support member is arranged on the bottom wall of the installation groove and is located between the support base and the side wall of the installation groove. The support member extends in a direction close to or away from the projection screen.

6. The ultra-short throw projection device according to claim 5, wherein One side of the receiving cavity close to the projection host has a third opening. The telescopic cloud platform further includes a dust-proof member, which is arranged at the third opening and has a distance from the support member. The dust-proof member is used to cover the third opening and expose a part of the projection host when the projection host moves.

7. The ultra-short focus projection device according to claim 5, wherein The transmission member includes a guide rod and a plurality of sliding members. The guide rod extends in a direction close to or away from the projection screen and is arranged in the receiving cavity. The plurality of sliding members are arranged at intervals on the guide rod. The driving member is connected with the support member through the sliding members.

8. The ultra-short throw projection device according to claim 7, characterized in that, The sliding member is connected with the installation groove.

9. The ultra-short throw projection device according to any one of claims 5-8, characterized in that, The projection host includes a lower shell. A part of the lower shell is recessed towards the direction close to the projection screen to form the installation groove. The support member is connected with the lower shell.

10. The ultra-short throw projection device according to any one of claims 5-8, characterized in that, The projection host includes a lower shell and a base. The lower shell has a receiving space. The base is located in the receiving space and is stacked with the lower shell. The installation groove is located on the lower shell and is communicated with the receiving space. The support member is connected with the base.

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